JP2019191550A - Projector device - Google Patents

Abstract

To provide a projector device for preventing failures in integrity generated by a conventional projector device.SOLUTION: There is provided a projector device including an illumination module and an imaging module. The imaging module is connected to the illumination module and includes a housing, a relay optical system, and a projection optical system. The housing includes a first annular storage groove and a second annular storage groove. The first annular storage groove and the second annular storage groove are arranged at an interval. The first annular storage groove is formed closer to the illumination module than the second annular storage groove and the axial line of the first annular storage groove and the axial line of the second annular storage groove are all located on the same axial line axis. The relay optical system includes a lens stored in the first annular storage groove. The projection optical system includes the lens and a reflection mirror stored in the second annular storage groove. The center of the lens of the relay optical system, the center of the lens of the projection optical system, and the center of the reflection mirror are all located on the axial line axis.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projector device, and more particularly to a highly integrated projector device.

  As video technology advances, projector devices are increasingly involved in people's lives. In a projector apparatus, a projection lens for clearly displaying an image on a screen is one of the central elements. Due to the limitation of the space to be used, a clear projection effect can be obtained even in a narrow space. Therefore, the projection lens of the projector apparatus tends to be gradually designed for a short focus projection lens.

  However, in the conventional projector apparatus, when an optical element (for example, a lens and a reflecting mirror) is attached, a problem in integration often occurs. Therefore, the present inventor conducted research to improve the above-mentioned problems, and finally submitted a design capable of improving the above demerits.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a projector device that improves a problem in integration that occurs in a conventional projector device.

  A projector apparatus is disclosed in an embodiment of the present invention. The projector device includes an illumination module and an imaging module. The illumination module includes a light generation device that generates color light and a light processing element that receives the color light and converts the color light into an image light beam. The imaging module is connected to the illumination module, receives the image light beam, and projects the image light beam onto an imaging surface. In particular, the imaging module includes a housing, a relay optical system, and a projection optical system. The housing includes a first annular housing groove and a second annular housing groove. Among these, the first annular housing groove and the second annular housing groove are provided with a space therebetween, and the first annular housing groove is closer to the illumination module than the second annular housing groove. The axial center line of the first annular housing groove and the axial center line of the second annular housing groove are both located on the same axis. The relay optical system includes at least one lens. The at least one lens in the relay optical system is housed in the first annular housing groove. The projection optical system includes at least one lens and a reflecting mirror. The at least one lens and the reflecting mirror in the projection optical system are housed in the second annular housing groove. The at least one lens in the projection optical system is interposed between the reflecting mirror and the relay optical system. The mirror core of the at least one lens in the relay optical system, the mirror core of the at least one lens in the projection optical system, and the mirror core of the reflecting mirror are all located on the axis of the axial line.

  In the projector device according to the embodiment of the present invention, the lens of the relay optical system is arranged such that the axial center line of the first annular housing groove and the axial center line of the second annular housing groove are positioned on the same axis. When the lens and the reflecting mirror of the projection optical system are housed in the first annular housing groove and the second annular housing groove is housed, the lens core of the relay optical system and the lens of the projection optical system The mirror core and the mirror core of the reflector can be aligned with the axis more easily than in the past. Accordingly, the optical elements of the imaging module are arranged coaxially, and the integration of the projector device can be effectively enhanced.

It is a perspective view which shows the projector apparatus which concerns on embodiment of this invention. It is a top view which shows the projector apparatus which concerns on embodiment of this invention. It is a side view which shows the projector apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows arrangement | positioning of the internal optical element which shows the projector apparatus which concerns on embodiment of this invention. It is a schematic diagram which projects an image light beam on an imaging surface in the projector device according to the embodiment of the present invention. It is a schematic diagram which shows the 1st cyclic | annular accommodation groove | channel and the 2nd cyclic | annular accommodation groove in the projector apparatus which concerns on embodiment of this invention. It is a mimetic diagram in which a radiating fin concerning an embodiment of the present invention does not exceed a virtual extension surface. It is a schematic diagram which shows that at least one part of the radiation fin which concerns on embodiment of this invention becomes flush with a virtual extension surface.

  For a better understanding of the features and technical contents of the present invention, reference is made to the following detailed description of the invention and the accompanying drawings. However, the accompanying drawings provided are provided for reference and explanation only and are not intended to limit the scope of the claims of the present invention.

  As shown in FIGS. 1 to 5, a projector apparatus 100 is disclosed in this embodiment. The projector device 100 includes an illumination module 1 and an imaging module 2. The illumination module 1 can generate color light B1 and convert the color light B1 into a video light beam B2. The imaging module 2 is connected to the illumination module 1. The imaging module 2 can receive the image light beam B2 and project the image light beam B2 on the image pickup surface P (as shown in FIG. 5). In the following, a specific configuration of each element of the projector device 100 according to the present embodiment will be described. And the connection relationship between each element of the projector apparatus 100 is demonstrated suitably.

  As shown in FIGS. 1 to 3, the illumination module 1 (also referred to as an image light flux generation module) includes a light generation device 11, a light processing element 12, a heat dissipation structure 13, and an illumination module fixing plate 14. The light generator 11 generates color light B1. The light processing element 12 receives the color light B1 and converts the color light B1 into an image light beam B2. The light generator 11 and the imaging module 2 are connected via an optical processing element 12. In the present embodiment, it is preferable that the light generation device 11, the light processing element 12, and the imaging module 2 are arranged to have an L shape. Accordingly, the space occupied by the projector device 100 in the length direction can be reduced, but the present invention is not limited thereto. The heat dissipation structure 13 is disposed on one side of the light processing element 12 or on one side of the relay optical system 22 as described below. As shown in FIGS. 4 and 6, in the present embodiment, a part of the heat dissipation structure 13 is positioned above the light processing element 12, and another part is positioned above the relay optical system 22. However, the present invention is not limited thereby.

  More specifically, the light generator 11 is a solid light source or a solid light source module. The solid state light source may be, for example, a light emitting diode (LED) or a laser diode (Laser Diode, LD). The solid light source or the solid light source module can reduce an extra volume of a projection light source (for example, a halogen light bulb) of the projector device. In the present embodiment, the light generator 11 is a solid light source module, and includes a red light emitting diode 111, a green light emitting diode 112, and a blue light emitting diode 113. Among them, the red light emitting diode 111 can generate red light, the green light emitting diode 112 can generate green light, and the blue light emitting diode 113 can generate blue light.

  The light processing element 12 includes a light coupling element (not shown), a light uniform element (for example, a compound eye transmissive lens, not shown), a reflecting element 121 (for example, a reflecting mirror), and a light transmitting element 122 (for example, a condensing lens). ), A prism group 123, and a digital micro-mirror device (DMD). The optical coupling element receives red light, green light, and blue light generated by the light generator 11, and generates color light B1 having three primary colors by optically mixing the red light, green light, and blue light. The optical coupling element emits the color light B1 to the light uniform element. The light uniform element performs a light uniformization process on the color light B1 so as to eliminate light unevenness of the color light B1, and emits the color light B1 to the reflective element 121. The reflection element 121 is disposed at a corner of the projector apparatus 100 that is disposed so as to be actually L-shaped. The reflective element 121 reflects the reflected color light B 1 and reflects the color light B 1 to the light transmissive element 122. The light transmissive element 122 condenses the color light B 1 and emits the color light B 1 to the prism group 123.

  With continued reference to FIG. The prism group 123 is provided at one end of the light processing element 12 close to the imaging module 2 (the left end of the light processing element 12 as shown in FIG. 4). The prism group 123 includes a first prism 1231, a second prism 1232, and a reflective film 1234. The second prism 1232 is in contact with (or in close contact with) the first prism 1231. A boundary surface between the first prism 1231 and the second prism 1232 is defined as a reflection surface 1233. The reflective film 1234 is provided on one side of the first prism 1231 away from the second prism 1232 and is in close contact with the first prism 1231. In this embodiment, the second prism 1232 is in close contact with the upper side of the first prism 1231, but the reflective film 1234 is in close contact with the lower side of the first prism 1231. As a result, the light processing element 12 of the present embodiment can reduce the volume of the projector device 100 by the arrangement of the prism group 123 of the biprism, and can further reduce the size and weight. It is worth mentioning that the prism group 123 in this embodiment is, for example, a reverse total reflection prism (RTIR PRISM), the reflection surface 1233 is a total reflection surface, and the reflection film 1234 is For example, a dielectric reflection layer, a silver layer, or an aluminum layer may be used, but the present invention is not limited thereto.

  With the above configuration, the color light B 1 generated by the light generation device 11 passes through the light transmissive element 122, then passes through the first prism 1231, is reflected by the reflective surface 1233, and is reflected by the reflective film 1234. Proceed toward. The reflective film 1234 reflects the reflected color light B 1, passes the color light B 1 sequentially through the first prism 1231 and the second prism 1232, and is supplied to one of the second prisms 1232 that are separated from the first prism 1231. The light is emitted to the side (emitted toward the upper side of the second prism 1232 as shown in FIG. 4).

  The digital micromirror display element 124 is provided on one side of the second prism 1232 away from the first prism 1231 (as shown in FIG. 4, the prism group 123 and the heat dissipation structure 13 are disposed above the prism group 123. Between). The digital micromirror display element 124 receives the color light B 1 emitted from the second prism 1232, converts the color light B 1 into an image light beam B 2, and then emits the image light beam B 2 to the imaging module 2.

  With continued reference to FIGS. The heat dissipation structure 13 includes a plurality of heat dissipation fins 131. By releasing the heat energy stored in the light processing element 12 or the relay optical system 22 by the heat dissipation structure 13 (heat energy generated by the digital micromirror display element 124), the reliability of the projector device 100 is improved. It is worth mentioning that there is a special matching relationship between the plurality of heat radiation fins 131 of the heat radiation structure 13 and the light guide surface 252 of the light output device 25 described below. The special matching relationship will be described in detail below.

  With continued reference to FIGS. The illumination module fixing plate 14 is connected to one side (for example, the left side) of the light processing element 12. The illumination module fixing plate 14 is substantially square and has a hollow configuration (not shown). The hollow configuration allows the image light beam B2 to pass.

  Please refer to FIGS. 1 to 4 together. The imaging module 2 (also referred to as an image light beam projection module) includes a casing 21, a relay optical system 22, a projection optical system 23, a cover 24, a light output device 25, and an imaging module fixing plate 26.

  The housing 21 includes a first annular housing groove 211 and a second annular housing groove 212. In the present embodiment, the first annular housing groove 211 and the second annular housing groove 212 have an annular shape (or a hollow cylindrical shape), but the present invention is not limited thereto. Further, the first annular housing groove 211 and the second annular housing groove 212 are arranged so as to be spaced apart from each other, and the first annular housing groove 211 is more than the second annular housing groove 212. It arrange | positions so that the illumination module 1 may be adjoined. In addition, since both the first annular housing groove 211 and the second annular housing groove 212 in the present embodiment have an annular shape (or a hollow cylindrical shape), the first annular housing groove 211 has an axial center line. An axial center line L211 is defined in the second annular housing groove 212. In particular, the axial center line L211 of the first annular housing groove 211 and the axial center line L212 of the second annular housing groove 212 are both located on the same axis L.

  As shown in FIG. 6, in the present embodiment, the diameter D211 of the first annular housing groove 211 is formed smaller than the diameter D212 of the second annular housing groove 212 and the first annular housing groove 211. The diameter D211 is 0.2 to 0.8 times the diameter D212 of the second annular housing groove 212. The diameter D211 of the first annular housing groove 211 is preferably 0.4 to 0.6 times the diameter D212 of the second annular housing groove 212, but the present invention is not limited thereto.

  More specifically, a step structure 2121 is formed on the inner wall of the second annular housing groove 212. The step structure 2121 has a plurality of steps (not shown). A plurality of sub annular grooves 2122 are formed so as to surround the plurality of steps. In addition, the diameter (not shown) of the plurality of sub annular grooves 2122 decreases from the projection optical system 23 toward the relay optical system 22.

  With continued reference to FIG. The function of the relay optical system 22 receives the image light beam B2 emitted from the illumination module 1, and guides the image light beam B2 to the projection optical system 23 according to the required optical effect. More specifically, the relay optical system 22 includes at least one lens 221. At least one lens 221 in the relay optical system 22 is housed in the first annular housing groove 211 and fixed (or engaged) to the inner wall of the first annular housing groove 211. In this embodiment, the number of the lenses 221 of the relay optical system 22 is six, and the six lenses 221 are from right to left, two single-layer lenses, two compound lenses, and single-layer lenses. Two are arranged in order.

  The function of the projection optical system 23 receives the image light beam B2 from the relay optical system 22 and then projects the image light beam B2 on the imaging surface P according to the required optical effect. More specifically, the projection optical system 23 includes at least one lens 231 and a reflecting mirror 232. At least one lens 231 and reflecting mirror 232 in the projection optical system 23 are housed in the second annular housing groove 212 and fixed (or engaged) to the inner wall of the second annular housing groove 212. Among these, at least one lens 231 of the projection optical system 23 is interposed between the reflecting mirror 232 and the relay optical system 22. In the present embodiment, the number of lenses 231 in the projection optical system 23 is three, and the three lenses 231 have one single-layer lens, one compound lens, and a single lens from right to left. One layer lens is arranged in order. One surface of the reflecting mirror 232 (for example, the right side surface of the reflecting mirror 232 shown in FIG. 4) faces the relay optical system 22 and is preferably formed as a concave mirror surface, and is formed as an aspheric concave mirror surface. It is more preferable.

  The numbers and shapes of the lenses 221 and 231 of the relay optical system 22 and the projection optical system 23 and the reflecting mirror 232 are allowed to be adjusted and changed correspondingly according to the design of different optical paths, and the present invention is limited thereto. Not.

  Furthermore, since both the axial center line L211 of the first annular housing groove 211 and the axial center line L212 of the second annular housing groove 212 are located on the same axial line axis L, the relay optical system 22 When the lens 221 is housed in the first annular housing groove 211 and the lens 231 and the reflecting mirror 232 of the projection optical system 23 are housed in the second annular housing groove 212, the lens 221 of the relay optical system 22. , C 231 of the lens 231 of the projection optical system 23, and C 232 of the reflecting mirror 232 are more easily aligned with the axis L of the axis, whereby each optical of the imaging module 2 can be easily aligned. The elements are arranged so as to be coaxial optical elements, and the integration of the projector device 100 can be effectively enhanced.

  In the present embodiment, the diameter of the lens 221 of the relay optical system 22 is formed smaller than the diameter of the reflecting mirror 232 than the diameter of the lens 231 of the projection optical system 23. The diameter of the lens 221 of the relay optical system 22 is preferably formed to correspond to the diameter of the first annular housing groove 211. Further, the diameters of the lens 231 and the reflecting mirror 232 of the projection optical system 23 are formed so as to correspond to the diameters of the plurality of sub-annular grooves 2122, respectively, whereby the lens 231 and the reflecting mirror of the projection optical system 23 are formed. Each of the 232 can stably engage with the plurality of sub annular grooves 2122. It is worth mentioning that the diameters D211 and D212 of the plurality of sub-annular grooves 2122 in this embodiment become smaller in the direction from the projection optical system 23 to the relay optical system 22, and therefore, the lens 231 and the reflecting mirror of the projection optical system 23 232 is formed in the plurality of sub annular grooves 2122 of the second annular accommodating groove 212 so as to be arranged in order from one end (for example, from the left end of the casing 21 according to FIG. 4) of the casing 21 away from the relay optical system 22. Attached, thereby further increasing the mounting efficiency of the optical element.

  With the above arrangement, the image light beam B <b> 2 generated by the illumination module 1 sequentially passes through the lens 221 of the relay optical system 22 and the lens 231 of the projection optical system 23 and is reflected by the reflecting mirror 232. Among these, when the image light beam B <b> 2 is reflected by the reflecting mirror 232, it further passes through the lens 231 of the projection optical system 23 and is projected onto the imaging surface P.

  The imaging module 2 in this embodiment can effectively reduce the volume of the projector device 100 by the arrangement of the optical elements of the relay optical system 22 and the projection optical system 23 and the design of the optical path described above. Thereby, size reduction and weight reduction can be achieved.

  With continued reference to FIG. The cover 24 is detachably attached to the housing 21 and used to close one end of the housing 21 that is away from the lighting module 1 (for example, from the left end of the housing 21 in FIG. 4). More specifically, the joint portion between the cover 24 and the housing 21 has, for example, a corresponding screw structure, and the cover 24 may be detachably screwed to the housing 21. Alternatively, the joint between the cover 24 and the casing 21 is formed in a corresponding concave-convex engagement configuration, for example, so that the cover 24 may be detachably engaged with the casing 21. The present invention is not limited thereto. In the present embodiment, the other surface of the reflecting mirror 232 (for example, the left side surface of the reflecting mirror 232 as shown in FIG. 4) is formed to face the relay optical system 22 and is in contact with the cover 24. . As a result, the stability of the cover 24 of the reflecting mirror 232 is effectively enhanced, thereby preventing displacement of the reflecting mirror 232 due to vibration or impact.

  With continued reference to FIGS. The light output device 25 is provided between the first annular housing groove 211 and the second annular housing groove 212, and is disposed on one side of the axial center line L (for example, above the axial center line L in FIG. 4). To position. In particular, the light output device 25 has a light output surface 251 and a light guide surface 252 connected to the light output surface 251, and the light output surface 251 is closer to the second annular housing groove 212 than the light guide surface 252. At the same time, the image light beam B2 from the illumination module 1 (or the image light beam B2 from the projection optical system 23) passes through the light output surface 251 and can be projected onto the image pickup surface P. The light guide surface 252 can restrict the projection of the image light beam B2 onto the projection range of the imaging surface P. In particular, the light output surface 251 and the light guide surface 252 are both non-parallel to the axis L, and the light output surface 251 and the light guide surface 252 have a depression angle θ of 60 degrees to 120 degrees. The light output surface 251 and the light guide surface 252 preferably have a depression angle θ of 80 degrees to 10 degrees. For example, the light output surface 251 may be a glass light transmission window or a hollow light transmission window, but the light output surface 251 is preferably a glass light transmission window. Thereby, for example, in order to avoid dust falling on the imaging module 2, the optical elements in the projection optical system 23 are protected without affecting the image light beam B2. It is worth mentioning that the plurality of heat radiation fins 131 in the heat radiation structure 13 and the light guide surface 252 of the light output device 25 have a special matching relationship. More specifically, the heat dissipation structure 13 and the light output device 25 of the imaging module 2 are located on the same side with respect to the axial line axis L (for example, the upper side of the axial line axis L in FIG. 4). Among them, a plurality of heights H (shown in FIG. 6) are formed so that the plurality of radiating fins 131 correspond to the axial center axis L, and at least a part of the plurality of the heights H is the part of the imaging module 2. It increases in the direction of the lighting module 1. In the present embodiment, since the number of the plurality of radiating fins 131 is ten, the number of the plurality of the heights H is ten, and among them, the six heights H (FIG. 4). 6 from the imaging module 2 to the illumination module 1, the other four heights H at 10 heights H (from the right as shown in FIG. 4). The four heights H) to the left have almost the same height.

  As shown in FIGS. 7 and 8, in the present embodiment, the light guide surface 252 is defined with a virtual extension surface F that overlaps the light guide surface 252 in the direction of the radiation fin 131. Among them, one end of the plurality of heat dissipating fins 131 away from the light processing element 12 is formed so as not to cross (not contact) the virtual extension surface F (as shown in FIG. 7), or the light processing element 12 One end of each of the plurality of heat radiation fins 131 may be formed so that at least a part thereof is flush with the virtual extension surface F (as shown in FIG. 8). As a result, when the image light beam B2 passes through the light output surface 251 and is projected onto the imaging surface P via the light guide surface 252, the image light beam B2 has a plurality of positions above the plurality of radiation fins 131. The heat radiating fins 131 can pass through without being blocked.

  In the projector device 100 according to the present embodiment, due to the matching relationship between the plurality of heat radiation fins 131 in the heat radiation structure 13 and the light guide surface 252 of the light output device 25, the heat radiation structure 13 affects the optical path of the image light beam B2. Heat dissipation effect can be maximized.

  With continued reference to FIGS. The imaging module fixing plate 26 is connected to one side (for example, the right side) of the casing 21. The imaging module fixing plate 26 is formed in a substantially square shape and has a hollow structure (not shown). The hollow structure allows the image light beam B2 to pass through. The shape of the imaging module fixing plate 26 is formed to correspond to the shape of the lighting module fixing plate 14, whereby the imaging module fixing plate 26 can be in close contact with the lighting module fixing plate 14 and the imaging module fixing plate 26. And the illumination module fixing plate 14 are fixed to each other so that the imaging module 2 is removably attached to the illumination module 1 by a plurality of fixing elements (not shown, for example, screws and nuts).

[Technical effects of the embodiment of the present invention]
In summary, in the projector device 100 according to the embodiment of the present invention, the axial center line L211 of the first annular housing groove 211 and the axial center line L212 of the second annular housing groove 212 both have the same axial line axis L. By being positioned, the lens 221 of the relay optical system 22 is accommodated in the first annular accommodating groove 211, and the lens 231 and the reflecting mirror 232 of the projection optical system 23 are accommodated in the second annular accommodating groove 212. In this case, the mirror core C221 of the lens 221 of the relay optical system 22, the mirror core C231 of the lens 231 of the projection optical system 23, and the mirror core C232 of the reflector are further easily aligned by the axis L. can do. Thereby, the optical elements in the imaging module 2 are arranged to be coaxial optical elements, and the integration of the projector device 100 can be effectively enhanced.

  The volume of the projector device 100 in the embodiment of the present invention is effectively reduced by the arrangement having the biprism prism group 123 and the optical element arrangement and the optical path design arranged through the relay optical system 22 and the projection optical system 23. In addition, the effect of reducing the size and weight can be achieved.

  In the present embodiment, one surface of the reflecting mirror 232 is formed to face the relay optical system 22 and is in contact with the cover 24. Thereby, the stability of the reflecting mirror 232 is effectively enhanced in the cover 24, thereby preventing displacement of the reflecting mirror 232 due to vibration or impact.

  In the projector device 100 according to the present embodiment, due to the matching relationship between the plurality of heat radiation fins 131 in the heat radiation structure 13 and the light guide surface 252 of the light output device 25, the heat radiation structure 13 affects the optical path of the image light beam B2. Heat dissipation effect can be maximized.

  The above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Equivalent modifications and changes made based on the claims of the present invention are described below. All belong to the protection scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 100 Projector apparatus 1 Illumination module 11 Light generator 111 Red light emitting diode 112 Green light emitting diode 113 Blue light emitting diode 12 Light processing element 121 Reflecting element 122 Light transmitting element 123 Prism group 1231 First prism 1232 Second prism 1233 Reflecting surface 1234 Reflective film 124 Digital micromirror display element 13 Heat radiation structure 131 Heat radiation fin 14 Illumination module fixing plate 2 Imaging module 21 Housing 211 First annular housing groove 212 Second annular housing groove 2121 Step structure 2122 Sub annular groove 22 Relay optical System 221 Lens 23 Projection optical system 231 Lens 232 Reflector 24 Cover 25 Light output device 251 Light output surface 252 Light guide surface 26 Imaging module fixing plate L Axle axis L211 and L212 Axis axis θ Angle P Imaging surface F Virtual extension surface B1 Colored light B2 Image light beam C221, C231, C232 Mirror core D211, D212 Diameter H Height

Claims (10)

An illumination module comprising: a light generator that generates colored light; and a light processing element that receives the colored light and converts it into an image light beam;
A relay optical system including a housing having a first annular housing groove and a second annular housing groove arranged at intervals, and at least one lens housed in the first annular housing groove; A projection optical system including at least one lens and a reflecting mirror housed in the two annular housing grooves, and an imaging module connected to the illumination module for receiving the image light beam and projecting it on the imaging surface. Prepared,
The first annular housing groove is formed closer to the illumination module than the second annular housing groove, and the axial center line of the first annular housing groove and the axial center of the second annular housing groove All lines are on the same axis line axis,
The at least one lens is located between the reflector and the relay optical system;
The mirror core of the at least one lens of the relay optical system, the mirror core of the at least one lens of the projection optical system, and the mirror core of the reflecting mirror are all located on the same axis line axis. A projector device.   The diameter of the first annular housing groove is smaller than the diameter of the second annular housing groove, and the diameter of the first annular housing groove is 0.2 times the diameter of the second annular housing groove. The projector device according to claim 1, wherein the projector device is formed to be 0.8 times. A step structure having a plurality of steps is formed on the inner wall of the second annular housing groove,
A plurality of sub-annular grooves are formed so as to be surrounded by the plurality of steps, and a diameter of the plurality of sub-annular grooves is formed so as to decrease from the projection optical system toward the relay optical system. The projector device according to claim 1. The imaging module further includes a cover removably attached to the housing so as to close one end of the housing away from the lighting module;
One surface of the reflecting mirror is formed as a concave mirror surface so as to face the relay optical system,
The projector device according to claim 1, wherein the other surface of the reflecting mirror is formed in a rearward direction with respect to the relay optical system and is in contact with the cover. The imaging module further includes a light output device that is interposed between the first annular housing groove and the second annular housing groove and is located on one side of the axial center axis,
The light output device is connected to the light output surface, the light output surface projecting the image light beam onto the imaging surface when the image light beam from the illumination module passes, and the image light beam is projected onto the image pickup surface. A light guide surface for limiting a projection range to be
The light output surface and the light guide surface are both formed non-parallel to the axial center axis, and the light output surface and the light guide surface have a depression angle of 60 degrees to 120 degrees. The projector device according to claim 1. The illumination module includes a heat dissipation structure located on one side of the light processing element or one side of the relay optical system and on the same side as the light output device of the imaging module with respect to the axial center axis.
The heat dissipating structure includes a plurality of heat dissipating fins formed with a plurality of heights so as to correspond to the axial center axis,
The projector device according to claim 5, wherein at least a part of the plurality of heights is formed so as to increase in accordance with a direction of the illumination module from the imaging module.   One end of the plurality of radiating fins away from the light processing element does not exceed the virtual extension surface that overlaps the light guide surface, or a part thereof is flush with the virtual extension surface that overlaps the light guide surface. The projector device according to claim 6, wherein:   When the image light flux passes through the light output surface, passes over the light guide surface, and is projected onto the imaging surface, the image light flux is not blocked by the plurality of heat radiating fins. The projector device according to claim 6, wherein the projector device passes above the radiation fin. The light processing element further comprises a prism group and a digital micromirror display element,
The prism group is disposed on one side of the imaging module close to the light processing element, and a boundary surface between the first prism and the first prism is defined as a reflection surface. A second prism, and a reflective film disposed on one side of the first prism away from the second prism,
The colored light generated by the light generator passes through the first prism, is reflected by the reflective surface, and marches in the direction of the reflective film. The reflective film sequentially transmits the colored light to the first prism. And the color light can be reflected so as to pass through the second prism and be emitted to one side of the second prism away from the first prism;
The digital micromirror display element receives the color light emitted from a second prism, converts the color light into the image light beam, and emits the image light beam in the imaging module. The projector device according to claim 1, wherein the projector device is disposed on one side away from the first prism. The image light flux generated by the illumination module passes through the at least one lens in the relay optical system and the at least one lens in the projection optical system, and is reflected by the reflecting mirror,
2. The projector according to claim 1, wherein the image light beam is reflected by the reflecting mirror and then re-passes through the at least one lens of the projection optical system and is projected onto the imaging surface. apparatus.

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